Description

Highly water resistant and lightweight (61g/m2) vapour permeable membrane suitable for use as the secondary protection layer in timber frame, steel frame and concrete wall systems.

At a glance

Breather membrane for timber framed walls

Suitable for insulation under timber cladding

100% HDPE Spunbonded Polyethylene

Highly water resistant and lightweight vapour permeable membrane

DuPont™ and Tyvek® are a trademark and a registered trademark of E. I. du Pont de Nemours and Company or its affiliated companies

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Engineered to provide protection to buildings and their occupants from external climatic conditions and from the effects of condensation.

Highly water resistant and lightweight (61g/m2) vapour permeable membrane suitable for use as the secondary protection layer in timber frame, steel frame and concrete wall systems. Membrane should be surface applied, fixed directly to ply/OSB sheathing board, insulation or blockwork.

The DuPont™ Tyvek® family of membranes have been developed by DuPont™ to provide protection against the hazards associated with the construction and use of buildings; the principle hazards are:

Climatic conditions - rain snow, hail, wind, ground moisture

Condensation - occurring on and within the building fabric

Tyvek® membranes are engineered for the purposes of providing protection to buildings and their occupants from external climatic conditions and from the effects of condensation. By controlling the movements of heat, air and moisture through the building envelope, Tyvek® membranes can make a major contribution to protecting the environment by improving the energy efficiency of buildings.

To achieve the required internal conditions with optimum efficiency it is essential to consider air flow and moisture movement together with all aspects of heat transfer, not only by conduction, but also by convection and radiation. The reduction of air leakage, the avoidance of damaging condensation and the provision of thermal insulation must all be considered together to ensure the protection and well-being of the occupants and the long term protection of the building fabric.

DuPont™ and Tyvek® are a trademark and a registered trademark of E. I. du Pont de Nemours and Company or its affiliated companies.

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How it works

The unique nonwoven structure of Tyvek® HouseWrap® makes it breathable, allowing moisture vapour to pass through. This helps promote drying in wall systems, to help prevent mould and water damage. In addition, Tyvek® HomeWrap® stops air movement through the walls, helping insulation perform closer to its full R-value, to provide a more energy-efficient home.

The DuPont™ Building Envelope System consists of products specifically designed for proper moisture and air management within wall systems. Tyvek® WB is a uniquely engineered product made by spinning extremely fine high-density polyethylene (HPDE) fibres that are fused together to form a strong, uniform web. The tough structure of Tyvek® is engineered to create millions of extremely small pores that resist bulk water and air penetration, while allowing moisture vapour to pass through.

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